S218 NTLW
High power, bandpass Subwoofer
2 x 18NTLW5000
S218 NTLW | SPEAKERS
18NTLW5000 8Ω
KEY FEATURES
SPECIFICATIONS
Nominal Impedance
Minimum Impedance
Nominal Power Handling1
Continuous Power Handling2
Sensitivity3
Frequency Range
Voice Coil Diameter
Winding Material
PARAMETERS4
Resonance Frequency
Re
Qes
Qms
Qts
Vas
Sd
Xmax
Mms
Bl
Le
EBP
1.
2.
3.
4.
8Ω
6.8 Ω
1800 W
4000 W
95.0 dB
30 - 1800 Hz
115 mm (4.5 in)
aluminum
32 Hz
5.5 Ω
0.33
8.52
0.32
176.0 dm3 (6.22 ft3)
1156.0 cm2 (179.18 in2)
17.5 mm
295.0 g
31.3 Txm
1.85 mH
96 Hz
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•
•
•
•
•
95 dB SPL 1W / 1m average sensitivity
Dual 115mm (4,5 in) Tetracoil Aluminum Voice coil
4000 W program power handling
Ultra linear suspension behavior for excellent sound clarity
Symmetric flux density and inductance behaviour
Low noise forced air cooling design
Water repellent cone and epoxy coated plates
Suitable for vented, horn loaded and bandpass applications
DESIGN
Surround Shape
Cone Shape
Magnet Material
Woofer Cone Treatment
Recommended Enclosure
Recommended Tuning
Triple roll
Curvilinear
Neo
Water, UV repellent
180.0 dm3 (6.36 ft3)
35 Hz
MOUNTING AND SHIPPING INFO
Overall Diameter
Bolt Circle Diameter
Baffle Cutout Diameter
Depth
Flange and Gasket Thickness
Net Weight
Shipping Weight
462 mm (18.19 in)
440 mm (17.32 in)
416.0 mm (16.38 in)
310 mm (12.2 in)
26 mm (1.02 in)
12.0 kg (26.46 lb)
12.8 kg (28.22 lb)
2 hours test made with continuous pink noise signal within the range Fs-10Fs. Power calculated on rated minimum impedance. Loudspeaker in free air.
Power on Continuous Program is defined as 3 dB greater than the Nominal rating.
Applied RMS Voltage is set to 2.83 V for 8 ohms Nominal Impedance.
Thiele-Small parameters are measured after a high level 20 Hz sine wave preconditioning test.
S218 NTLW | BILL OF MATERIALS
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2x 18NTLW5000 – 8 ohm
16x M6 Wood T-Nuts
16x M6 Hex socket head ISO 4762 with washer and grower washer
2x Neutrik NL4MPR
Edilfiber damping material 30mm - 30kg/m3
S218 NTLW | MEASUREMENTS
Frequency response & Impedance response
120
Half-Space sensitivity 1w/1m
(dB) Level, Sound pressure
Impedance, Amplitude + Phase (ohm)
60
115
54
110
48
+90°
105
42
100
36
0°
95
30
90
24
85
18
-90°
80
12
75
6
70
10
20
50
100
200
500
1k
2k
5k
0
10k
20k
Frequency (Hz)
S218 NTLW | MEASUREMENTS
CEA2010B
165
Half-Space Sensitivity 1w/1m
(dB) Level, Sound pressure
160
Weighted &
Tone Burst Center
Limited Maximum
Frequency (Hz)
SPL (dB)
155
150
20
112
25
130
32
139
40
136
135
50
138
130
63
143
80
143
100
143
125
143
160
143
145
140
125
120
115
20
30
40
50
60
70
80
90
100
Frequency (Hz)
S218 NTLW | PROCESSING
Equalization curve with HPF & LPF
Equalization curve
25
(dB) Level, Sound pressure
25
20
20
15
15
10
Equalization points:
Pk: Frq: 29Hz – Q:3 – Gain: 2dB
Pk: Frq: 93Hz – Q:3 – Gain: -3.4dB
Pk: Frq: 145Hz – Q:1.8 – Gain: -9.5dB
Pk: Frq: 200Hz – Q:3 – Gain: -3.4dB
5
0
-5
10
0
-10
-15
-20
-20
20
30
40
50
60
70
80
90 100
200
300
400
500
Frequency (Hz)
LPF:
LR 24dB/oct @ 80Hz
-5
-15
10
HPF:
BTW 24dB/oct @ 27Hz
5
-10
-25
(dB) Level, Sound pressure
-25
10
20
(dB) Level, Sound pressure
120
115
115
110
110
105
105
100
100
95
95
90
90
85
85
80
80
75
75
70
10
20
30
40
50
60
70
80
90 100
40
50
60
70
80
90 100
200
300
400
500
Frequency (Hz)
200
300
400
500
Frequency (Hz)
Subwoofer response
Subwoofer response
120
30
200
300
400
500
Frequency (Hz)
70
(dB) Level, Sound pressure
10
20
30
40
50
60
70
80
90 100
S218 NTLW
Assembly Information
S218 NTLW | DAMPING MATERIAL
Edilfiber (Polyester) 30kg/m3 – 30mm thick
Follow carefully the quantity and positioning
S218 NTLW | DAMPING MATERIAL
Edilfiber (Polyester) 30kg/m3 – 30mm thick
Follow carefully the quantity and positioning
S218 NTLW | DIMENSIONS
Total dimensions
Material: 15mm birch plywood
S218 NTLW | DIMENSIONS
Top View
S218 NTLW | DIMENSIONS
Top View
S218 NTLW | DIMENSIONS
Front View
S218 NTLW | DIMENSIONS
Back View
S218 NTLW | DIMENSIONS
Baffle
Woofer hole position is MANDATORY
S218 NTLW | DIMENSIONS
Reflex
Central round opening is MANDATORY
S218 NTLW | NOTES